Some times you can find this stamp cheap from people who are collecting only Nobel Price winner or Red Cross and Gandhi is not Noble Price winner (This is a great embrassement for all the Nobel prize winners !!) and collectors of that nobel prize stamps don't need this Gandhi stamp. If you are lucky you will get cheap otherwise collector has to pay high price.
The price in an old Michel catalogue is cheap and they never warned in Michel Rundschau about high prices of this Gandhi stamp.
If anyone has more info about this stamp than please comment on it.
Following are links from delcampe auction site and you will be amazed what price it is selling for and who are the bidders. Look carefully to bidders name.
1) Delcampe item # 85864077
2) Delcampe item #64552460
3) Delcampe item #91402531
4) Delcampe item #64552460
You can read more about this stamps on following website.:-